Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1401
PUT
Ventas
VTR
$48.9B
| $5.59M | ﹤0.01% |
95,000
+23,800
| +33% | +$1.5M |
|
1402
PUT
SolarEdge
SEDG
$2.59B
| $5.58M | ﹤0.01% |
410,700
+147,300
| +56% | +$2.27M |
|
1403
Stellantis
STLA
$16.5B
| $5.58M | ﹤0.01% |
427,981
-12,164
| -3% | -$161K |
|
1404
PUT
W.W. Grainger
GWW
$65.3B
| $5.58M | ﹤0.01% |
34,700
+500
| +1% | +$563K |
|
1405
PUT
Thor Industries
THO
$3.99B
| $5.56M | ﹤0.01% |
58,100
-40,100
| -41% | -$4.28M |
|
1406
CALL
BlackBerry
BB
$5.01B
| $5.56M | ﹤0.01% |
1,470,800
+660,000
| +81% | +$1.75M |
|
1407
CALL
Rocket Companies
RKT
$36.9B
| $5.56M | ﹤0.01% |
493,500
+40,100
| +9% | +$597K |
|
1408
CALL
Sable Offshore Corp
SOC
$903M
| $5.55M | ﹤0.01% |
242,600
+159,800
| +193% | +$3.5M |
|
1409
WillScot Mobile Mini Holdings
WSC
$4.8B
| $5.55M | ﹤0.01% |
166,067
+145,927
| +725% | +$5.36M |
|
1410
CALL
JetBlue
JBLU
$1.96B
| $5.53M | ﹤0.01% |
703,800
+218,100
| +45% | +$1.48M |
|
1411
CALL
Comstock Resources
CRK
$3.97B
| $5.52M | ﹤0.01% |
303,100
+92,700
| +44% | +$1.28M |
|
1412
PUT
Scorpio Tankers
STNG
$3.96B
| $5.52M | ﹤0.01% |
111,100
-66,600
| -37% | -$3.8M |
|
1413
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $5.51M | ﹤0.01% |
32,300
+900
| +3% | +$161K |
|
1414
PUT
Cboe Global Markets
CBOE
$29.8B
| $5.51M | ﹤0.01% |
28,200
-37,900
| -57% | -$7.8M |
|
1415
CALL
FIVE9
FIVN
$1.77B
| $5.51M | ﹤0.01% |
135,600
-24,700
| -15% | -$891K |
|
|
HCP
1416
CALL
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $5.51M | ﹤0.01% |
161,000
-17,300
| -10% | -$586K |
|
1417
CALL
Northern Oil and Gas
NOG
$2.3B
| $5.5M | ﹤0.01% |
148,100
+400
| +0.3% | +$15.7K |
|
1418
PUT
Rubrik
RBRK
$15.1B
| $5.5M | ﹤0.01% |
84,100
+64,200
| +323% | +$3.17M |
|
1419
ProShares UltraPro S&P 500
UPRO
$5.1B
| $5.49M | ﹤0.01% |
+61,882
| New | +$5.66M |
|
1420
PUT
Howmet Aerospace
HWM
$116B
| $5.48M | ﹤0.01% |
50,100
+35,800
| +250% | +$3.92M |
|
1421
PUT
Box
BOX
$4.02B
| $5.48M | ﹤0.01% |
173,300
+146,800
| +554% | +$4.82M |
|
1422
CALL
CNX Resources
CNX
$4.85B
| $5.47M | ﹤0.01% |
149,300
+115,000
| +335% | +$4.24M |
|
1423
CALL
Groupon
GRPN
$980M
| $5.47M | ﹤0.01% |
450,500
+213,500
| +90% | +$2.24M |
|
1424
PUT
Glaukos
GKOS
$9.02B
| $5.46M | ﹤0.01% |
36,400
+15,300
| +73% | +$2.11M |
|
|
MAXN
1425
CALL
DELISTED
Maxeon Solar Technologies
MAXN
| $5.46M | ﹤0.01% |
723,600
+715,348
| +8,669% | +$5.54M |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.